That does look like a foul that gets called 99 times out of 100. Green's arms weren't straight up; they were clearly angled over. If he had been Sam Hauser, he would've picked up that foul I bet. Of course the confounding factor is that, end of game, refs tend to swallow their whistles anyway.
Edit: Well, I guess the
two-minute NBA report disagrees with me; it says that's a correct no-call. I swear that kind of contact gets called all the time though. One more thing: on the slow-motion, you can see that Green has his arms straight up at first, but then angles them lower a little, so pretty much ensures there will be contact ... it's subtle, which goes to show that Green is crafty for sure.